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Ryuya
9bc4ab000f
When obtaining counts, `data` cannot be used to obtain counts, and `count` must be used.
91 lines
2.4 KiB
Plaintext
91 lines
2.4 KiB
Plaintext
import Layout from '~/layouts/DefaultGuideLayout'
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export const meta = {
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id: 'sql-to-api',
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title: 'Converting SQL to JavaScript API',
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description: 'Implementing common SQL patterns in the JavaScript API',
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}
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{/* @TODO: this one is a very daunting read on first attempt. Need to check what is the purpose of it */}
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Select a set of columns from a single table with where, order by, and limit clauses.
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```sql
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select first_name, last_name, team_id, age
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from players
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where age between 20 and 24 and team_id <> 'STL'
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order by last_name, first_name desc
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limit 20;
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```
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```js
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const { data, error } = await supabase
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.from('players')
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.select('first_name,last_name,team_id,age')
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.gte('age', 20)
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.lte('age', 24)
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.not('team_id', 'eq', 'STL')
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.order('last_name', { ascending: true }) // or just .order('last_name')
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.order('first_name', { ascending: false })
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.limit(20)
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```
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Select all columns from a single table with a complex where clause: OR AND OR
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```sql
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select *
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from players
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where ((team_id = 'CHN' or team_id is null) and (age > 35 or age is null));
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```
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```js
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const { data, error } = await supabase
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.from('players')
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.select() // or .select('*')
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.or('team_id.eq.CHN,team_id.is.null')
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.or('age.gt.35,age.is.null') // additional filters imply "AND"
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.not('team_id', 'eq', 'STL')
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```
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Select all columns from a single table with a complex where clause: AND OR AND
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```sql
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select *
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from players
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where ((team_id = 'CHN' and age > 35) or (team_id <> 'CHN' and age is not null));
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```
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```js
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const { data, error } = await supabase
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.from('players')
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.select() // or .select('*')
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.or('and(team_id.eq.CHN,age.gt.35),and(team_id.neq.CHN,.not.age.is.null)')
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```
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Get a count of rows, but don't return any data.
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```sql
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select count(*)
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from players
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where team_id = 'NYM';
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```
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```js
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const { count, error } = await supabase
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.from('players')
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.select('*', { count: 'exact', head: true }) // exact, planned, or executed
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.eq('team_id', 'NYM')
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```
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## Resources
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- [Supabase Account - Free Plan OK](https://supabase.com)
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- [Postgrest Operators](https://postgrest.org/en/stable/api.html#operators)
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- [Supabase API: JavaScript select](/docs/reference/javascript/select)
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- [Supabase API: JavaScript modifiers](/docs/reference/javascript/using-modifiers)
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- [Supabase API: JavaScript filters](/docs/reference/javascript/using-filters)
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export const Page = ({ children }) => <Layout meta={meta} children={children} />
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export default Page
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